Process for storing information and a material having information written thereon
US5472815A · kind A · utility
2Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jan 25, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31504
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A coated material comprising a substrate which is coated with a layer of a pyrrolopyrrole of formula I ##STR1## wherein R.sub.1 and R.sub.2 may be 4-pyridyl and X.sub.1 and X.sub.2 are O, said compound of formula I being at least partially in the form of a salt of a strong acid, is suitable for use as an optical recording material and, owing to its electrical conductivity and photoconductivity, as antistatically treated material, as sensor, photoreceptor and solar battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.